单选题 Interlanguage refers to a system of rules developed in the minds of L2 learners, which has some features of ______ plus some that are independent of ______.
【正确答案】 D
【答案解析】题干意为：中介语是指在第二语言学习者的头脑中形成的一套规则体系，它既有第一语音和第二语言的特点，又有独立于第一语音和第二语言的特点。故选D项。A、B、C三项：与题干不符，排除。